Bob
The issues seem to be:
Which classics are fun
Keep their value
Can be maintained at less than stupid cost by garage or enthusiast
Are well designed
Have some "street cred"
Not so rare as to be prohibitive to drive
Astons fall into this category, but they are generally very expensive. The cheapest one you'll see advertised is about £35k, and you'll see most Pagodas at £10k less than that
Here, there's other cars that are in that list - Mk2/E-Type Jag, Healey 3000 - but are generally considered harder to drive and less reliable as a car. Unless of course you buy a new one!